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We have it on our 09 135 Vert and to us, well worth the price. Never a warranty issue, some HP and TQ improvements, sounds great, and better than new after a software change that seem to rob some power. If I did not get the PPK1, would have went with Dinan. I know there are many that make more power, but I did not want any problems at the dealer if an engine blew. Now after the Warranty period, I would consider other options. Then again, in rush hour Chicago traffic, does it really matter all that much?
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